Mechanical doubler for sheet and tin plates



' P. B. ABRAMSEN.

MECHANICAL DOUBLER FOR SHEET AND TIN PLATES. APPLICATION H LED NOV. I0,I9I9- RENEWED APR. 8. I922.

Patented Nov. 7,1922.

4, SHEETS-SHEET l.

P. B. ABRAMSEN.

MECHANICAL DOUBLER FOR SHEET AND TIN PLATES. APPLICATION FILED NOV- 10.1919- RENEWED APR. 8, 1922. 1,434,470.

Patented Nov. 7, 1922.

4 SHEETS-SHEET 2.

INVENTOR WITNESS I P. B. ABRAMSEN. MECHANICAL DOUBLER FOR SHEET AND TINPLATES. APPLICATION FILED-NOV. 10. 1919. RENEWED APR. 8. 1922.

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P. B. ABRAMSEN. MECHANICAL DOUBLER FOR SHEET AND TIN PLATES. APPLICATIONFILED NOV. I0. 1919. RENEWED so STATES Patented PETTER B. ABRAMSEN, FDORMONT, PENNSYLVANIA.

MECHANICAL DOUBLER non SHEET am) TIN PLATES.

Application filed November 10, 1919, Serial No. 336,773. Renewed April8, 1922. Serial-No. 550,791.

To all whom it may concern:

Be it known that I, PMTER B. ABRAMsEN,

a subject of the King of Norway, residing at Dormont, in the county ofAllegheny and 'State of Pennsylvania, have invented a new and usefulImprovement in Mechanical Doublers for Sheet and Tin Plates, of whichthe following is a full, clear, and exact description, reference beinghad to the aclo, companying drawings, forming part of thisspecification, in which Figures 1 and 2 are plan views of a doublerembodying my invention; Figure 1 being partly in horizontal section andthe two views showing some of the parts in different positions;

Figures 3 and 4 are longitudinal sections of the parts in differentpositions;

Figure 5 is a side elevation of the doubler;

and

vide a simple and eflicient mechanical doubler by means of which thework maybe readily and accurately performed.

The nature of my invention will be best understood by reference to theaccompany- 0 ing drawings, in which I have shown the preferredembodiment thereof and whlchwill now be described, it being premised,

however, that various changes can be made in details of constructlon andarrangement and combination of the several parts, without departing fromthe spirit and scope of my invention as defined in the appended claims.

" In the drawings, the numeral 2 designates 4 a flat table uppn whichthe, sheets are placedto be folded, the sheets being successivelydelivered in any usual or suitable manner. .This table is provided withside plates or brackets 3', suitably secured thereto. -At the V 5 rearend of the working portion of the table there is formed a transverselyextending pocket ordepression 4, having an inclined forward wall 5,leading up to the table surface. Preferably a ridge 6' is formed at thejunction of the table surface with this inclined surface, the reason forwhich will presently appear. 7 designates a doubleacting hydrauliccylinder, whose plunger 8 is connected to a cross head 9. The oppositeend portions of this cross head are connected by the pitmans 10, with afolder which comprises a body portion 11, of general I-shape in planview, and having rollers 12, journaled at the front and rear sidesthereof, the journal seats being provided in the ends of said body. Thepitmans 10 are connected to the plns or trunnions 13, at opposite endsof this body, and these pins or trunnions are extended to form journalsfor the small rollers 14. The inner faces of the side plates or brackets3 are provided with cam tracks for the rollers 14, each of these tracksconsisting' of an upper branch 15, and a lower branch 16, the twobranches merging into each other at each end. At the rear end, the

merged portions of the tracks extend d0wnwardly to about the level ofthe bottom of the pocket 4,-as shown at 17.

'18 designates members .over which the sheet or plate is folded. Thesemembers are in the form of pins arranged to be projected inwardly overthe table 2 at opposite sides thereof, in order that the sheet or platemay i be bent around them, after which they are withdrawn. The sideplates .3 of the table are. provided with suitable guides 19 for thesemembers.

- R'eciprocation of these -members can be.

effected in various ways from the movement of the cross head 9. Intheparticular construction which I have illustrated, each of the members 18has a pin-and-slot connec- 'tion at 20 with the forwardly extending arm21-- of a lever pivoted at 22. j The opposite rearwardly extending armof this lever has a cam track somewhat similar to the cam tracks 15 and16, before described; that is to say, each of these tracks has the. twobranches 28 and 24 merging at each end and adapted to be engaged bypins25 orthe like, carried on lugs 26, which are attached to the cross head9, and slide in'slots 27 in the side frames 3.

The operation is as follows: The sheet or plate to be folded is fed ontothe table in the position substantially as illustrated in Figure 3, withthe advanced end portion thereof extending over and across the pocket 4.At this time, the cross head 9 is in its retracted position and thefolding member rests on the bottom of said pocket, as shown in Figure3-. The hydraulic cylinder is then actuated to move the cross headforwardly. This causes the folding member to move upwardly on theinclined surface 5, and into contact with the under side of the sheet,raising the latter to the position shown in dotted lines in Fi ure 3.During this forward movement 0 the cross head, the levers 21 are movedfrom the position shown in full lines in Figure 1 to the position shownin fulllines in Figure 2, thereby projecting the members 18, over thetable, as shown in full lines in Figure 2. When the folding memberreaches the position shown in dotted lines in Figure 3, the roller 12thereof contacts with the ridge, and said device swings on its centralpivotal connections with the. pitmans 10, whereby as the rollers 13 moveforwardly in the upper branches 15 of the cam tracks in the side plates,the folding member turns over and downwardly,

thereby doubling the sheet over the members 18, and down upon itself,reaching the position shown in full lines in Figure 4.

The cylinder 7 is then reversed and the folding device moves backwardlyover the sheet, thus smoothing down the fold, the rollers 13 nowtraveling in the lower branches 16 of the cam slots. During thisrearward movement of the cross head, the members 18 are retracted. Asthe folding device moves over the ridge 6, this ridge acts to put an in-"creased pressure on the plate and thus complete the fold. Thisincreased pressure results from the elevation of the roller 12, which isin engagement with the ridge,thereby rotating the folder about thetrunnions 13 and forcing the other roller 12 into closer engagement withthe material being folded.

' the next operation.

'VVhen the folding device is again in the pocket 4, the folded sheet isremoved from the table and the parts are then ready for A comparison ofFigures land 2 will 'make clear the manner in which the levers 21 are,actuated to operate the members 18 in timed'relationto the-movement ofthe folder. During the forward movement of the cross head, the pins 26move in the inner branches 24 of the cam tracks in said levers, thusswinging the forward'arms of said levers inwardly. During the reversemovement of i the cross-head, these pins travel in the outer branches.23 of said cam tracks, and thus move the levers to retract the members18.

It will be readily understood that the fold- Fing device is notnecessarily of the form iwhich I have'herein shown and described.

I prefer, however, to use a device of the character which will haverelatively widely sepsheets .to be folded so as to exert a holding i'action and overcome" the tendency of the sheets or plates to curl, asis the case where there is a limited or line contact therewith.

arated pointswof contact with the plates or This tendency iscounteracted by theme of a folder such as herein disclosed, due to thesimultaneous operation on the material'at separated points whereby thereisan effectual holding of the sheets at different points 101']-gitudinally thereof. 7

The advantages of my invention will be apparent from the foregoing,since it provides a mechanical doubler composed of few parts which areconstructed and arranged to operate in a simple and positive manner andto rapidly and accurately double and fold the sheets or plates.

I. claim: v

1. In a doubler for sheet and tin plates, the combination with a table,a combined folding and holding device arranged to reciprocate on saidtable and normally lying below the level thereof, reciprocating membersadapted to be projected inwardly over said table from the sides thereofand about which the sheets or plates are doubled, and a motive deviceoperatively connected to the folding and holding device and to saidmembers to operate them in timed relation to surface and over which thefolding and holding device is movable, means for reciprocating saidfolding andholding device, and fold-determining members adapted to bealternately projected over and retracted from position above said table,together with means for actuating said members in timed relation to themovement of the folding and holding device, said device having aplurality of longitudinally spaced portions for simultaneous contactwith the material being operated upon, substantially as described.

3; In a mechanical doubler, the-combination with a table having a recessor pocket extending transversely of the table and having'an inclinedwall' extending forwardly and upwardly to the table surface, of afolding device comprising a carriage having a plurality of rollers"journaled on different transverse axes therein and adapted to travel upsaid incline and over said table, mean-s for reciprocating saidcarriage, and means for guiding the carriage substantiallyasdesc'ribe'd;

4. In a mechanical doubler for sheet and tin plate, the combination witha table having a transversely extending recess or pocket therein, of acombined folding and holding device normally lying within said recess orpocket, means for reciprocating sai'd foldingin its movement, I

having a plurality of longitudinally spaced portions for simultaneouscontact with the material being operated upon. substantially asdescribed.

5. In a mechanical doubler, a folding device comprising a tiltingcarriage, said carriage having a plurality of roller members journaledon different transverse axes therein, and means for reciprocating thecarriage, substantially as described.

6. ln a mechanical doubler, a table having a transversely extendingrecess or pocket, the forward wall of said pocket being inclinedupwardly and forwardly to the table surface and there being atransversely extending ridge at the junction of said surfaces,substantially as described.

7. In a mechanical doubler, the combination with a table having sideguides provided with cam tracks, of a doubling device comprising acarriage adapted to engage the material being operated upon at aplurality of longitudinally spaced lines and having guiding meansengaging the cam tracks, and

means for reciprocating the carriage, and means for causing the carriageto swing about the central transverse axis thereof as it is moved,substantially as described.

8. In a mechanical doubler, a table a tilting doubling folding device co-operating therewith, said device having spaced rollers formingseparated points of roller contact with the sheet or plate to bedoubled, and means for reciprocating said device, substantially asdescribed.

9. In a mechanical doubler, a table and a doubling and folding deviceco-operating therewith, said device comprising a transverse c'arriage,and actuating members in and between which said carriage is pivoted,said carriage having members for contact with the sheet at-differentpoints longitudinally thereof, together with means for reciprocating thesame over the table in a plane substantially parallel thereto,substantially as described.

10. In a mechanical doubler, a table and a doubling and folding deviceco-operating' therewith, said device comprising a transverse carriage,and actuating members in and between which said carriage is pivbted,said carri'agehaving members for contact with the sheet at differentpoints longitudinally thereof, together with means for causing thecarriage to swing on its pivot at a predetermined point in its movement,substantially as described.

11. A mechanical doubler having a combined doubling, folding and holdingdevice, and means for imparting a reciprocating and also a swingingmovement to said device, substantially as described.

12. A mechanical doubler, comprising a doubling and folding member,means for reciprocating said member, and means whereby said member iscaused to swing upwardly and over on its forward movement, and to movebackwardly in a substantially straight line for a portion of itsrearward movement, said member having means for holding the materialbeing doubled during said backward movement, substantially as described.

13. In a' mechanical doubler, a reciprocating cross head, a doubling,folding and holding member connected thereto, a motive device forreciprocating said head, and folddetermining members also having anactuating connection with said cross head, sub stantially as described.

14. In a mechanical doubler, a reciprocating cross head, a doubling andfolding member connected thereto, a motive device for reciprocating saidhead, and fold-determining members also having an actuating connectionwith said cross head, said connections comprising levers carrying saidfolddetermining members, and engaged by the cross-head, substantially asdescribed.

'15. A mechanical doubler having a table and reciprocatingfold-determining members movable laterally over the table from oppositesides thereof, together with a combined doubling, folding and holdingmember operated in timed relation to said members, substantially asdescribed.

16. In a mechanical doubler, a doubling and folding device reversibleabout a transverse axis, and having means on opposite sides of said axisfor engaging the material being doubled, substantially as described.

17. In a mechanical-doubler, a foldim: device comprising a carriagereversible about a central transverse axis, and roller members journaledin said carriage on opposite sides of said central axis, substantiallyas described.

l8. lln a mechanical doubler, a folding device comprising .a carriagereversible about a central transverse axis, a plurality of rollermembers journaled on opposite sides of said axis, and means foroperating said carriage, substantially as described.

19. lln a mechanical doubler, the combination with a table having guidesprovided with cam tracks, of a doubling device com prising a carriagehaving guiding means engaging the cam tracks, means for operating thecarriage, means for causing the carriage to swingabout the centraltransverse axis thereof as it is operated, and means carried by saidcarriage on opposite sides of said axis for engaging the material beingoperated upon, substantially as described.

In testimony whereof I have hereunto set my hand.

ILMD'

